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Marc SitzeMS

Marc Sitze

Frontend Web Developer | React | Nextjs | TS

€200/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Marc


🚀 React & Next.js Frontend Developer | High-performance and modern web applications

Frontend Developer specializing in React and Next.js, I assist startups, SMEs, and product teams in creating fast, scalable, and user-experience-oriented interfaces.

My goal: to transform your mockups and ideas into reliable, high-performance, and maintainable web applications, while respecting your technical and business constraints.

đź’ˇ What I bring you:

- Solid expertise in React / Next.js

- Clean, readable, and scalable code

- Faithful integration of mockups (Figma, UX/UI)

- Clear communication and regular follow-up

🛠️ Key Skills:

- React.js, Next.js

- JavaScript / TypeScript

- HTML5, CSS3, Tailwind, Styled Components, Material UI

- REST / GraphQL API consumption

- Performance & SEO Optimization

- Git, Agile team collaboration

📌 Available for short or long-term assignments, team augmentation, or from-scratch development.

👉 Have a frontend project or need? Contact me to discuss.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km), Marseille (up to 50km), Toulouse (up to 50km), Lyon (up to 50km), Nice (up to 50km)

Experience

  • Bubo
    Lead Frontend
    TECH
    February 2024 - June 2025 (1 year and 4 months)
    Paris, France
    Frontend technical leadership: defining best practices, choosing technologies (React, Next.js, TypeScript), and implementing a scalable architecture.

    Frontend team management: supporting developers, code reviews, mentoring, and skill development for the team.

    Product & design collaboration: coordinating with UI/UX and product teams to transform business needs into performant and intuitive interfaces.

    Critical feature development: designing and implementing reusable components and key modules to accelerate delivery.

    Quality process implementation: integrating tests (unit and end-to-end), CI/CD, and code reviews to improve robustness and reduce technical debt.

    Performance optimization: improving loading times, accessibility, and SEO of delivered applications.

    Documentation & knowledge transfer: creating technical guides and clear documentation to ensure project maintainability.

    Cross-functional communication: interfacing with management, backend, and design teams to ensure technical and functional consistency of deliverables.
    React.js Next.js TypeScript GraphQL TailwindCSS
  • Freelance
    Web Developer
    E-COMMERCE
    June 2021 - Today (5 years)

    đź’» As a freelance Fullstack Developer (React / Next.js / Node.js), I've assisted several companies and startups in creating and evolving their web applications.

    👉 My freelance missions have included:

    Developing SaaS applications (project management, task tracking, multi-tenancy).

    Designing modern and responsive showcase and e-commerce websites.

    Implementing real-time search solutions (job boards, external API integration).

    Creating interactive dashboards and internal tools to improve productivity.

    🎯 My priority: delivering reliable, performant, and scalable solutions, while ensuring clear communication and regular follow-up with my clients.
    Node.js NestJs React Native Fullstack React.js
  • PNTEC Ltd
    Freelance Developer
    September 2020 - June 2021 (9 months)
    Yaoundé, Cameroon
    Developing responsive user interfaces with React and SASS.

    Participating in the integration of UI/UX mockups provided by the design team.

    Contributing to the implementation of reusable components to improve code consistency.

    Collaborating with the backend team to consume REST APIs.

    Participating in code reviews and applying feedback to improve quality.

    Implementing simple unit tests to validate basic functionalities.

    Resolving front-end bugs and improving performance on certain pages.Developing responsive user interfaces with React and TailwindCSS.

    Participating in the integration of UI/UX mockups provided by the design team.

    Contributing to the implementation of reusable components to improve code consistency.

    Collaborating with the backend team to consume REST APIs.

    Participating in code reviews and applying feedback to improve quality.

    Implementing simple unit tests to validate basic functionalities.

    Resolving front-end bugs and improving performance on certain pages.
    TailwindCSS JavaScript NestJs jQuery PHP

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Education

  • Fundamental Computer Science
    UNIVERSITY OF YAOUNDE
    2020
    Programmation Logiciel

Certifications

Skill set

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